Rotary shaft assembly, foldable shell and electronic device

Abstract

A rotary shaft assembly includes a base, a first rotating mechanism, a second rotating mechanism and a damping mechanism. The first rotating mechanism is rotatably connected to one side of the base, and the second rotating mechanism is rotatably connected to the other side of the base opposite to the one side. The damping mechanism includes an abutting member slidably connected to the base, and a first elastic member. The first rotating mechanism is rotatably connected to the abutting member, the second rotating mechanism is rotatably connected to the abutting member, and the axis of the first circular-arc groove is parallel to that of the second circular-arc groove. The first elastic member has a pre-elastic force for causing the abutting member to press against the first rotating mechanism and/or the second rotating mechanism.

1 . A rotary shaft assembly, comprising:
 a base;   a first rotating mechanism, rotatably connected to one side of the base;   a second rotating mechanism, rotatably connected to another side of the base opposite to the one side; and   a damping mechanism, comprising an abutting member slidably connected to the base and a first elastic member; wherein the first rotating mechanism is rotatably connected to the abutting member through cooperation of a first circular-arc rail and a first circular-arc groove, and the second rotating mechanism is rotatably connected to the abutting member through cooperation of a second circular-arc rail and a second circular-arc groove; an axis of the first circular-arc groove is parallel to an axis of the second circular-arc groove; and the first elastic member has a pre-elastic force that causes the abutting member to press against the first rotating mechanism and/or the second rotating mechanism.   
     
     
         2 . The rotary shaft assembly according to  claim 1 , wherein the first rotating mechanism comprises a first rotating member rotatably connected to the base; the first circular-arc rail is disposed on one of the first rotating member and the abutting member, the first circular-arc groove is defined on the other of the first rotating member and the abutting member, and a first rotation axis between the first rotating member and the abutting member is collinear with the axis of the first circular-arc groove; and the second rotating mechanism comprises a second rotating member rotatably connected to the base, the second circular-arc rail is disposed on one of the second rotating member and the abutting member, the second circular-arc groove is defined on the other of the second rotating member and the abutting member, and a second rotation axis between the second rotating member and the abutting member is collinear with the axis of the second circular-arc groove. 
     
     
         3 . The rotary shaft assembly according to  claim 2 , further comprising a support mechanism, wherein the support mechanism comprises a first side support member and a second side support member; the first side support member is slidably and rotatably connected to the base, and the first side support member is rotatably connected to the first rotating mechanism; the second side support member is slidably and rotatably connected to the base, and the second side support member is rotatably connected to the second rotating mechanism; and the first rotating member and the second rotating member rotate relative to the base, so that the first side support member and the second side support member are able to achieve unfolding or folding relative to each other. 
     
     
         4 . The rotary shaft assembly according to  claim 3 , wherein the first rotating member comprises a first limit part and a second limit part spaced apart from each other, and the abutting member comprises a first abutting part; when the first side support member and the second side support member are in a unfolded state, the first abutting part presses against the first limit part; when the first side support member and the second side support member are in a folded state, the first abutting part presses against the second limit part; and/or, the second rotating member comprises a third limit part and a fourth limit part spaced apart from each other, and the abutting member further comprises a second abutting part; when the first side support member and the second side support member are in the unfolded state, the first abutting part presses against the third limit part; and when the first side support member and the second side support member are in the folded state, the first abutting part presses against the fourth limit part. 
     
     
         5 . The rotary shaft assembly according to  claim 4 , wherein the first rotating member further comprises a first damping part located between the first limit part and the second limit part, and the second rotating member further comprises a second damping part located between the third limit part and the fourth limit part; and when the first side support member and the second side support member are in an intermediate state, the first abutting part presses against the first damping part, and the second abutting part presses against the second damping part. 
     
     
         6 . The rotary shaft assembly according to  claim 4 , wherein the abutting member further comprises a first sliding part, and the first sliding part is slidably connected to the base through cooperation of a first sliding-guiding groove and a first sliding-guiding rail; the first sliding-guiding groove extends parallel to the first rotation axis between the first rotating mechanism and the base; and the first sliding-guiding groove is defined on one of the base and the abutting member, and the first sliding-guiding rail is disposed on the other of the base and the abutting member. 
     
     
         7 . The rotary shaft assembly according to  claim 6 , wherein the abutting member further comprises a first extension arm and a second extension arm disposed on two opposite sides of the first sliding part, respectively; the first circular-arc rail is disposed on an end of the first extension arm away from the first sliding part, and the second circular-arc rail is disposed on an end of the second extension arm away from the first sliding part; the first abutting part is disposed on a side of the first extension arm close to the first circular-arc rail, and the second abutting part is disposed on a side of the second extension arm close to the second circular-arc rail. 
     
     
         8 . The rotary shaft assembly according to  claim 7 , wherein the first abutting part is connected to a circular-arc surface of the first circular-arc rail away from the first sliding part, and a length of the first circular-arc rail extending in a first direction is greater than a length of the first abutting part extending in the first direction; and the second abutting part is connected to a circular-arc surface of the second circular-arc rail away from the first sliding part, and a length of the second circular-arc rail extending in the first direction is greater than a length of the second abutting part extending in the first direction. 
     
     
         9 . The rotary shaft assembly according to  claim 7 , wherein the abutting member further comprises a first positioning part and a second positioning part, the first positioning part is disposed on a side of the first extension arm away from the first circular-arc rail, and the second positioning part is disposed on a side of the second extension arm away from the second circular-arc rail, and the first positioning part and the second positioning part are configured to position two first elastic members, respectively. 
     
     
         10 . The rotary shaft assembly according to  claim 2 , wherein the first rotation axis between the first rotating member and the base is parallel to a first direction, the second rotation axis between the second rotating member and the base is parallel to the first direction, the first rotation axis is spaced apart from the second rotation axis, and the first rotating member and the second rotating member are staggered in the first direction. 
     
     
         11 . The rotary shaft assembly according to  claim 3 , wherein the first side support member comprises a first adjustment arm, the first adjustment arm defines a first adjustment groove, and an end of the first adjustment groove passes through an end of the first adjustment arm close to the base to form a first opening; the base comprises a first adjustment shaft, an axis of the first adjustment shaft is parallel to the first rotation axis between the first rotating member and the base, and the first adjustment shaft is able to be inserted into the first adjustment groove from the first opening; the second side support member comprises a second adjustment arm, a second adjustment groove is defined on the second adjustment arm, and an end of the second adjustment groove passes through an end of the second adjustment arm close to the base to form a second opening; and the base further comprises a second adjustment shaft, an axis of the second adjustment shaft is parallel to the second rotation axis between the second rotating member and the base; and the second adjustment shaft is able to be inserted into the second adjustment groove from the second opening. 
     
     
         12 . The rotary shaft assembly according to  claim 1 , wherein the rotary shaft assembly further comprises a synchronization mechanism, the synchronization mechanism comprises a linkage member, a first synchronization member, and a second synchronization member; the linkage member is connected to the base and able to slide relative to the base in a first direction, and the linkage member comprises a first connection part and a second connection part; the first synchronization member is rotatably connected to the first connection part through cooperation of a first spiral groove and a first transmission part, and the second synchronization member is rotatably connected to the second connection part through cooperation of a second spiral groove and a second transmission part; and a rotation direction of the first spiral groove is opposite to that of the second spiral groove. 
     
     
         13 . The rotary shaft assembly according to  claim 12 , wherein the first spiral groove is defined on one of the first connection part and the first synchronization member, and the first transmission part is disposed on the other of the first connection part and the first synchronization member; and the second spiral groove is defined on one of the second synchronization member and the second connection part, and the second transmission part is disposed on the other of the second synchronization member and the second connection part. 
     
     
         14 . The rotary shaft assembly according to  claim 12 , wherein a third rotation axis between the first synchronization member and the first connection part is parallel to the first direction, a fourth rotation axis between the second synchronization member and the second connection part is parallel to the first direction, and the third rotation axis and the fourth rotation axis are parallel to or coincide with each other. 
     
     
         15 . The rotary shaft assembly according to  claim 14 , wherein the first connection part and the second connection part are respectively located on two sides of a center line of the linkage member, the center line of the linkage member is parallel to the first direction, and the first spiral groove is defined on the first connection part; the first synchronization member comprises the first transmission part, and the second spiral groove is defined on the second connection part; and the second synchronization member comprises the second transmission part, and the first spiral groove and the second spiral groove are staggered from each other in the first direction. 
     
     
         16 . The rotary shaft assembly according to  claim 14 , wherein the first connection part is provided with two first spiral surfaces, and the two first spiral surfaces are respectively disposed on two opposite sides of the first spiral groove along the first direction; the first transmission part comprises two opposite first abutting surfaces, and the two first abutting surfaces are respectively attached to the two first spiral surfaces; the second connection part is provided with two second spiral surfaces, and the two second spiral surfaces are respectively disposed on two opposite sides of the second spiral groove along the first direction; the second transmission part comprises two opposite second abutting surfaces, and the two second abutting surfaces are respectively attached to the two second spiral surfaces; and a rotation direction of the first spiral surface is opposite to that of the second spiral surface. 
     
     
         17 . The rotary shaft assembly according to  claim 16 , wherein the first connection part is provided with a first spiral rail on the first spiral surface of the first spiral groove, the first transmission part defines a first transmission groove corresponding to the first spiral rail, and the first spiral rail is accommodated in the first transmission groove; the second connection part is provided with a second spiral rail on the second spiral surface of the second spiral groove, the second transmission part defines a second transmission groove corresponding to the second spiral rail, and the second spiral rail is accommodated in the second transmission groove; and a rotation direction of the first spiral rail is the same as that of the first spiral groove, and a rotation direction of the second spiral rail is the same as that of the second spiral groove. 
     
     
         18 - 19 . (canceled) 
     
     
         20 . The rotary shaft assembly according to  claim 3 , wherein the first side support member and the second side support member are in contact with each other on their facing side surfaces when the first side support member and the second side support member are in the unfolded state. 
     
     
         21 . A foldable shell, comprising:
 a rotary shaft assembly, comprising:
 a base; 
 a first rotating mechanism, rotatably connected to one side of the base; 
 a second rotating mechanism, rotatably connected to another side of the base opposite to the one side; and 
 a damping mechanism, comprising an abutting member slidably connected to the base and a first clastic member; wherein the first rotating mechanism is rotatably connected to the abutting member through cooperation of a first circular-arc rail and a first circular-arc groove, and the second rotating mechanism is rotatably connected to the abutting member through cooperation of a second circular-arc rail and a second circular-arc groove; an axis of the first circular-arc groove is parallel to an axis of the second circular-arc groove; and the first elastic member has a pre-elastic force that causes the abutting member to press against the first rotating mechanism and/or the second rotating mechanism; and 
   two frame bodies, wherein the rotary shaft assembly is disposed between the two frame bodies, an end of the first rotating mechanism away from the base is connected to one of the two frame bodies, and an end of the second rotating mechanism away from the base is connected to the other of the two frame bodies.   
     
     
         22 . An electronic device, comprising:
 a flexible screen;   two frame bodies; and   a rotary shaft assembly, comprising:
 a base; 
 a first rotating mechanism, rotatably connected to one side of the base; 
 a second rotating mechanism, rotatably connected to another side of the base opposite to the one side; and 
 a damping mechanism, comprising an abutting member slidably connected to the base and a first elastic member; wherein the first rotating mechanism is rotatably connected to the abutting member through cooperation of a first circular-arc rail and a first circular-arc groove, and the second rotating mechanism is rotatably connected to the abutting member through cooperation of a second circular-arc rail and a second circular-arc groove; an axis of the first circular-arc groove is parallel to an axis of the second circular-arc groove; and the first elastic member has a pre-elastic force that causes the abutting member to press against the first rotating mechanism and/or the second rotating mechanism; 
   wherein the rotary shaft assembly is disposed between the two frame bodies, an end of the first rotating mechanism away from the base is connected to one of the two frame bodies, an end of the second rotating mechanism away from the base is connected to the other of the two frame bodies, and the flexible screen is connected to the two frame bodies and the rotary shaft assembly.